Safely store vials from - 196 to + 121 °C in mechanical freezers as well as liquid nitrogen. These PC boxes are designed with unique features to help orient, identify and access vials with ease. Forward-sloped base and high contrast indexing on the transparent lid ensure quick visual orientation. Hinged lid with built-in stop allows easy one-handed access to samples. A built-in stop prevents the lid from swinging too far when the box is picked up by the lid, helping to prevent accidental spills. The 25-well model does not incl. a hinged lid. All boxes have vent and drainage holes.